Lifting-board for drop-hammers.



G. H. MERRILL. LIFTING BOARD FOR DROP HAMMERS.

APPLICATION FILED JULY 18, 1911.

1,91 53. Patented Mar. 31, 1914.

Fiql.

TE STATES PATENT OFFICE.

GEORGE H. MERRILL, OF NEW YORK, N. Y.

LIFTING-BOARD FOR DROP-HAMMERS.

Specification of Letters Patent.

Application filed July 18, 1911.

To all whom it may concern:

Be it known that I, GEORGE H. MERRILL, a citizen of the United States, and resident of the borough of Brooklyn, in the city and State of New York, have invented a new and useful Improvement in Lifting-Boards for Drop-Hammers, of which the following is a specification.

This invention relates to lifting boards for drop hammers, and has for its object to provide a device of this character which will maintain its shape and effective operating qualities throughout its life, and yet Will be cheap to manufacture.

Another object is to provide certain improvements in the construction, form and arrangement of the various parts whereby the foregoing objects maybe effectively carried out.

Friction boards for drop hammers have been commonly, if not universallygmade of wood, and considerable difliculty has been experienced in their use owing to the fact that they are liable to splinter or crack, ,or warp and break, and thus become useless long before their natural life of usefulness has expired. In the effort to overcome this,

it has been necessary to select with great.

care and at considerable expense, ,pieces of wood especially adapted to avoi injury during their normal operative life. With these considerations in mind, I have conceived the idea of constructing these boards of a series of longitudinal strips or sections held together by means of transverse fasten- 111 s.

a practical embodiment of the invention is represented in the accompanying drawings in which,

Figure 1 represents a detail side elevation of the drop hammer board, showing its engagement with the lifting rollers and with the hammer. Fig. 2 represents a detail front view of the board, parts being broken away. Fig. 3 represents a side view of the parts shown in Fig. 2, and Fig. 4 represents a section taken in the plane of the line A-A of Fig. 2, looking in the direction of the arrows.

The lifting board is composed of a plurality of longitudinal wooden strips or sections 1, in the present instance four being shown as composing a board. These strips are slightly wider than they are thick, although this shape is not an essential of the invention, and each of the strips is shown as being of the same width and thickness as the other str s or sections. The sections 1 are smooth-s1 ed and adapted to abut against each other, edge to .edge, in order to form, when assembled, a board of very much greater width than thickness that it may be suitable for the purpose above noted. Each of the strips or sections 1 is rovided with a plurality of transverse ho es 2, running through the sections from edge to ed e. These holes are 50 located in each of t e strips or sections 1, that when the latter are properly assembled, the holes in each strip or section will register with holes in the other strips or sections so that there will be a series of transverse holes through the entire board considered as a unit. These holes are interiorly screw-threaded in each of the strips or sections 1, for engagement with exteriorly screw-threaded headless bolts 3, which are passed through all of the sections from edge to edge in order to hold them in firm assembly as a single board. These headless bolts 3 may be composed of any suitable metal, such, for instance, as iron.

The method of securing the board to the drop hammer 4, shown in the present instance is by means of a wedge 5; but this method forms no part of the invention.

By constructing the board of a plurality of longitudinal sections, I am enabled to use pieces of wood which were heretofore useless owing to their narrowness, and I am also enabled to match the several strips or sections so as to produce a proper graining of the board as a whole. The fact that the board is composed of a plurality of sections also prevents it from warping, and the fact that the strips or sections do not have any particular configuration other than a simple rectangular cross section, permits them to be produced at an extremely low figure. Again, the headless bolts being screw-threaded into each individual section holds the parts much more firmly together than if a series of through-bolts were relied upon.

It is to be understood that various'changes might be resorted to without departing from the spirit and scope of this invention, and hence I do not wish to limit myself to the precise form shown and described.

What I claim is:

A lifting board for drop hammers comprising a plurality of smooth-sided lon 'tudinal sections laid side by side so as to orm a flat board, said sections being held in asheadless bolts, each of said bolts having a.

screw-threaded engagement with each of the sections, and said bolts beingspaced a substantially equal distance apart throughout the board.

In testimony that I claim the foregoing as my inrention I have signed my name inpresence of two witnesses, this thirteenth 10 day of July, 1911.

GEORGE H. MERRILL.

Witnesses:

' PETER G. Poms,

GLENADA B. PUELs. 

